甲午中日战争前30年间，民族资本的总额只有680万元，而甲午战争后3年，民族资本

核潜艇在海水中长期航行需要大量的氧气供应，为解决这一难题，科学家设想在潜艇中建立一个小球藻空气净化器．这一设想的依据是植物的______作用能产生氧气，空气净化器中必须提供的原料是水和______．

阅读理解。

     American kids are talking more tests than ever before, and they're stressed out. Is help on the way? Just

the sight of a test makes some kids sweat. For others, it is a blank answer sheet. Then there are the frightening

words, "Take out your Number 2 pencil." All three fill 10-year-old Chelsea Logo with fear. "I start to tap my

pencil on the desk," says the fifth grader, "Then I feel the butterflies in my stomach."

     Chelsea is not alone. In a recent survey, more than 70% of kids aged 9 to 13 said they worry about tests.

It's no wonder. Across the United States, public schools give more than 250 million standardized tests each

year.

     Why do kids have to take so many tests? The No Child Left Behind (NCLB) law requires that students in

grades 3 through 8 be tested each year. The law's goal is for all students to be at grade level by 2014. Students

must pass the tests and meet other requirements or their schools may be shut down.

     US Secretary of Education Arne Duncan wants to change NCLB. But that doesn't mean he favors getting

rid of tests. Duncan believes tests should be used mainly to evaluate kids' strengths and weaknesses. Tests,

Duncan says, should not be used to punish kids or their schools for failure. "The goal is to focus on great

teaching and learning," Duncan said.

     Under NCLB, each state sets its own standards for students to meet. The result, Duncan says, is that states

are making the tests easier. To fix this problem, 48 states are now working together to create common

standards. "I want to set a high bar for kids," Duncan says, "so they'll be in great shape to achieve their dreams."

     Like them or not, tests are here to stay. So how can you handle test stress? Schools are teaching students

to relax through deep breathing and stretching. In Oakland, California, Principal Zarina Ahmad of Piedmont

Avenue Elementary leads her students in a cheer to get them excited about learning.

1. The underlined part "the butterflies in my stomach" in Para I can be replaced by _____.

A. guilty

B. nervous

C. exciting

D. proud

2. According to the passage, the NCLB law _____.

A. is focusing on teaching methods in schools

B. is requiring schools to make the tests more difficult

C. is trying to make schools be responsible for students

D. aims to evaluate kids' strengths and weaknesses by means of tests

3. We can learn from the passage that Arne Duncan _____.

A. is strongly against tests

B. suggests closing some schools

C. is concerned about students' development

D. suggests each state set its own standard

4. It can be concluded from the last two paragraphs that _____.

A. it's impossible to get rid of tests

B. schools have no good way to deal with students' stress

C. tests help assess what students have to learn

D. schools are aware of students' stress caused by tests

中风的诱发因素主要有

A．烦劳

B．恼怒

C．醉饱无常

D．外感风寒

E．气候变化

某企业预测2007年度销售收入净额为1500万元，现销与赊销比例为2:3，应收账款平均收账天数为90天，变动成本率为60%，企业的资金成本率为10%，一年按360天计算。 要求： (1) 计算2007年度赊销额； (2) 计算2007年度应收账款的平均余额； (3) 计算2007年度维持赊销业务所需要的资金额； (4) 计算2007年度应收账款的机会成本额； (5) 若2007年应收账款平均余额需要控制在180万元，在其他因素不变的条件下，应收账款平均收账天数应调整为多少天

共用账户允许分行范围内（）使用，定向账户和专用账户只允许（）之间使用。

A.会计机构

B.指定会计机构

C.所有会计机构